'American Idol': Top 7 perform recap

It's Idol Gives Back week - American Idol's telethon benefiting charities around the world. In that vein, the contestants are singing songs of inspiration under the guidance of R&B songstress Alicia Keys.

Here's what the judges had to say...

Casey James - 'Don't Stop Thinking About Tomorrow' by Fleetwood Mac

Randy: "It was good, but not your best because every week we see the same thing from you," he tells Casey.

Ellen: "You have to be great right now and no-one will think about that tomorrow," she insists.

Kara: "With 'Jealous Guy' a few weeks back you showed your range, but here you're in a jam band," she says.

Simon: Calls the song "not particularly inspiring" and an overall "lazy performance".

Lee DeWyze - 'The Boxer' by Simon & Garfunkel

Randy: Tells him: "I'm your biggest fan and I think you're a great artist ready for a big career."

Ellen: Calls it his best performance, saying that it was full of depth and growth.

Kara: Feels like Lee had his moment tonight and not last week as others thought. She recommends that he keep picking songs that are close to him.

Simon: "The difference between that performance and the last one was staggering," he says. He calls it truly "sincere" and "inspirational", adding: "The song sounded like it was written last week."

Tim Urban - 'Better Days' by The Goo Goo Dolls

Randy: Calls it an interesting choice and "okay karaoke".

Ellen: Says Tim's like the soup of the day and this time she didn't like the soup.

Kara: Tells him that he's found his lane, but he didn't quite get there this week.

Simon: Thinks that he's still improved, but this may have been too big a challenge for him as a performance.

Aaron Kelly - 'I Believe I Can Fly' by R Kelly

Randy: Says that Aaron picked a "giant song", but has huge vocal talent.

Ellen: She believes Aaron can fly, even though it was a tough song to choose.

Kara: Compares it to going down the runway, saying that he got it and took off.

Simon: Likes it because he knows Aaron, but would have turned the song off if he heard it on the radio.

Siobhan Magnus - 'When You Believe' by Whitney Houston

Randy: Says she picked the toughest song of the night and it was just okay.

Ellen: Disagrees and thinks it's more confirmation as to why she's here.

Kara: Feels like it was too dramatic and too much like a musical. Also says that she doesn't know who Siobhan is as an artist yet.

Simon: Says that it was the wrong song and thinks the "leaves" [butterflies] on her dress were distracting.

Michael Lynche - 'Hero' by Nickleback

Randy: He was a little worried about the choice, but Mike held his own.

Ellen: Thinks he did a great job.

Kara: Thinks he doesn't have the tone for it and it was all over the place.

Simon: Believes that because it was from Spider-Man, "it didn't quite gel this week".

Crystal Bowersox - 'People Get Ready' by Al Green

Randy: Gets out of his chair and gives her the first standing ovation of the season.

Ellen: Says that Crystal has never looked more beautiful and gets better and better.

Kara: Thanks Crystal for taking a risk and putting her guitar down. "You just schooled all those contestants," she says.

Simon: Tells her that it was inspirational and that he's happy she showed some emotion. "For me, it was in a completely different class," he says.